Element A has two isotopes. The first isotope is present 13.00% of the time and has a mass of 240.39. The second isotope has a mass of 189.67. Calculate the atomic mass of element A.
⭕ 5,590.8
⭕ 233.8
⭕ 16,532.54
⭕ 196.3
⭕ The atomic mass cannot be calculated without more information.
What is the shape of ?
⭕ trigonal pyramidal
⭕ tetrahedral
⭕ trigonal planar
⭕ bent
⭕ linear
What is the angle of ?
10 ml of commercial vinegar solution was added to 100ml volumetric flask distilled water was added till the line mark. 5 ml of the dilute vinegar was titrated against standardized NaOH solution of molar concentration 0.25M. The end point was reached after the addition of 3.32 ml NaOH solution. The concentration of acetic acid in commercial vinegar solution is:
?